TY - JOUR
T1 - Cooperative effects of Coulomb and electron-phonon interactions in the two-dimensional 16-band d-p model for iron-based superconductors
AU - Yanagi, Yuki
AU - Yamakawa, Youichi
AU - Adachi, Naoko
AU - Ono, Yoshiaki
PY - 2010/8/24
Y1 - 2010/8/24
N2 - We study the electronic states and the superconductivity in the two-dimensional 16-band d-p model coupled with A1g, B1g, and Eg local phonons and obtain the rich phase diagram including the magnetic-, charge-, and orbital-ordered phases on the parameter plane of the Coulomb and electron-phonon interactions. When the electron-phonon interaction is dominant, the charge fluctuations induce the s++ -wave superconductivity, while when the Coulomb interaction is dominant, the magnetic fluctuations induce the s± -wave superconductivity. Remarkably, the orbital fluctuations are enhanced due to the cooperative effects of the Coulomb and electron-phonon interactions and induce the s++ -wave and the nodal s± -wave superconductivities.
AB - We study the electronic states and the superconductivity in the two-dimensional 16-band d-p model coupled with A1g, B1g, and Eg local phonons and obtain the rich phase diagram including the magnetic-, charge-, and orbital-ordered phases on the parameter plane of the Coulomb and electron-phonon interactions. When the electron-phonon interaction is dominant, the charge fluctuations induce the s++ -wave superconductivity, while when the Coulomb interaction is dominant, the magnetic fluctuations induce the s± -wave superconductivity. Remarkably, the orbital fluctuations are enhanced due to the cooperative effects of the Coulomb and electron-phonon interactions and induce the s++ -wave and the nodal s± -wave superconductivities.
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U2 - 10.1103/PhysRevB.82.064518
DO - 10.1103/PhysRevB.82.064518
M3 - Article
AN - SCOPUS:77957555567
VL - 82
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 6
M1 - 064518
ER -